JP2005119791A - Paper sheet conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet conveying device capable of controlling the conveying speeds of a plurality of driving motors to be constant for each section in starting, a normal operation, or stopping when a plurality of divided conveying passages are driven by the plurality of driving motors. <P>SOLUTION: The paper sheet conveying device comprises a first conveying passage 20a for conveying a paper sheet 11a, an encoder 7a for measuring the conveying speed, a second conveying passage 20b for taking in the paper sheet 11a conveyed from the first conveying passage 20a, an encoder 7b for measuring the conveying speed, and control circuits 8a and 8b for controlling the conveying speeds of the first and second conveying passages 20a and 20b comparing the measurement results of the encoders 7a and 7b. The control circuits 8a and 8b control the the conveying speeds of these conveying passages to be constant in starting, the normal operation, or stopping. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides a conveyance speed at the start of a paper sheet conveyance device composed of a plurality of conveyance paths, a conveyance speed at the time of normal operation, and a conveyance speed at the time of stop for each section at the time of activation, normal operation, and stop. In particular, the present invention relates to a paper sheet transport apparatus that controls the transport speed so that the transport speeds of a plurality of transport paths are constant.

  For example, a paper sheet transport device that transports paper sheets such as mail and banknotes is based on a paper sheet take-out unit, a paper sheet shape detection unit, a paper sheet surface information detection unit, and the results of these detections. Perform printing, branching and stacking. In addition, since the parts having different functions are continuously arranged along the transport path, the transport path is inevitably elongated before the series of processing units is transported. Therefore, normally, the conveyance path is divided, and a plurality of the divided conveyance paths are continuously formed by independent drive motors.

  However, in the conveyance path having the plurality of drive motors, the difference between the motor torque of the drive motor, the load of the roller or the belt, or the difference in the weight of the paper sheets may be caused at the time of starting or stopping. There was a problem that the speed of the conveyance path changed and problems such as catching up and overlapping of paper sheets were likely to occur.

As a technique for solving this problem, a paper sheet transport device that corrects a gap between transported paper sheets is known (see, for example, Patent Document 1).
JP 2001-97592 A (first page, FIG. 1)

  However, the paper sheet transport device described in Patent Document 1 has a rapid change in the transport speed when there is a rapid speed change or load variation at the time of start or stop, and an appropriate gap. Therefore, there is a problem that it cannot be applied to a paper sheet transport apparatus in which a plurality of transport paths are driven by independent drive motors.

  Accordingly, the present invention provides a plurality of transport paths for each section at the time of starting, normal operation, and stopping when the plurality of divided transport paths are driven by a plurality of drive motors. It is an object of the present invention to provide a paper sheet transport device that reduces the speed difference so that the transport speed of the paper is constant.

To achieve the above object, the present invention provides a first transport path for transporting paper sheets, a first transport speed measuring means for measuring the transport speed of the first transport path, and the first transport. A second transport path arranged adjacent to take in the paper sheets transported from the path, a second transport speed measuring means for measuring the transport speed of the second transport path,
Comparing the measurement results of the first and second transport speed measuring means, the first and second control means for controlling the transport speed of the first transport path and the second transport path, respectively. It is characterized by.

  According to the present invention, when a plurality of divided conveyance paths are driven by a plurality of drive motors, a plurality of conveyance motors for each section at the time of start-up, normal operation, and stop are set to the conveyance speed of the plurality of drive motors. It is possible to provide a paper sheet transport device that can maintain a constant transport speed of the road.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram of a mail processing sorter mechanism according to a first embodiment of the present invention. The mechanism part of the postal processing sorter shown in FIG. 1 includes an A transport mechanism unit 20a (first transport path) and a B transport mechanism unit 20b (second transport path). Since the A transport mechanism unit 20a and the B transport mechanism unit 20b are similar in configuration, the A transport mechanism unit 20a will be mainly described, and then different parts will be described.

  The A transport mechanism section 20a sandwiches the paper sheet 11a and transports it in the direction of the arrow X in the figure, and a transport speed correction section 22a that monitors the transport speed of the transported paper sheet 11a and corrects the transport speed. Consists of

  The transport unit 21a includes a power source, a power transmission mechanism that transmits the power source, and a transport mechanism that transports the paper sheet 11a by receiving power from the mechanism.

  The power source includes a drive motor 4a and an inverter 3a which is a rotation speed setting means for setting the rotation speed of the drive motor 4a.

  The power transmission mechanism for transmitting the power source includes a pulley 5a1 disposed on the rotation shaft of the drive motor 4a, a drive belt 6a connected to the pulley 5a1 to transmit the driving force, and the driving force of the drive belt 6a transported as described above. The pulley 5a2 is transmitted to the mechanism.

  The transport mechanism includes a transport roller 2a1 that is rotated by a driving force received by the pulley 5a2, a transport belt 1a that is connected to the transport roller 2a1 and transmits the driving force, and a transport roller 2a2 that is driven by the transport belt 1a. Is done.

  Further, the conveyance speed correction unit 22a is arranged on the rotation shaft of the conveyance roller 2a2, and measures an conveyance speed by an encoder 7a (first conveyance speed measurement means), and a control circuit 8a (processes an output signal of the encoder 7a). First control means).

  The control circuit 8a calculates the transport speed of the A transport mechanism by measuring the encoder pulse output from the encoder 7a, and is connected to the control circuit 8b (second control means) of the B transport mechanism. The transport speed of the B transport mechanism is calculated.

  The B transport mechanism unit 20b is configured in the same manner as the A transport mechanism unit 20a, and is disposed downstream of the A transport mechanism unit 20a in the transport direction.

  The control circuit 8a and the control circuit 8b are connected to each other, and the control circuit 8a transmits the output signal of the encoder 7a to the control circuit 8b. The control circuit 8b receives the encoder 7b (second transport speed measuring means). ) Is transmitted to the control circuit 8a. With this configuration, it is possible to mutually calculate the transport speed of the A transport mechanism and the transport speed of the B transport mechanism.

  Next, with reference to FIG. 2 and FIG. 3, explanations regarding the start time and stop time of the paper sheet 11 a or the paper sheet 11 b transported by the A transport mechanism unit and the B transport mechanism unit configured as described above will be given. explain.

  FIG. 2 is a timing chart illustrating the conveyance speed from the start to the stop of the mail processing sorter mechanism according to the first embodiment.

  FIG. 2A is a timing chart of the standard conveyance speed. That is, at the time of activation, the conveyance speed is accelerated from 0 (m / s) (timing t1), and reaches the standard conveyance speed Vs (m / s) at the standard activation time trs (s) (timing t2). At the time of stop, deceleration is started from the point where the stop is instructed (timing t3), and the conveyance speed becomes 0 (m / s) at the standard stop time tfs (s) (timing t4).

  FIG. 2B is a timing chart in the case where the conveyance speed at the time of starting and stopping is faster than the standard conveyance speed. That is, the activation time trh (s) is dtr (s) shorter than the standard activation time trs (s) (timing t2). At the time of stop, the stop time tfh (s) is shorter than the standard stop time tfs (s) by dtf (s) (timing t4). The start time trh (s) and the stop time tfh (s) described above are expressed by Equations (1) and (2).

trh (s) = trs−dtr (1)
trh (s): start time when the conveyance speed is high dtr (s): deviation time from the standard start time tfh (s) = tfs−dtf (2)
tfh (s): Stop time when the transport speed is high dtf (s): Deviation time from the standard stop time FIG. 2C is a timing when the transport speed at the time of start and stop is slower than the standard transport speed. It is a chart. That is, the activation time trl (s) is dtr (s) longer than the standard activation time trs (s) (timing t2). At the time of stop, the stop time tfl (s) is dtf (s) longer than the standard stop time tfs (s) (timing t4). The start time trl (s) and the stop time tfl (s) described above are expressed by equations (3) and (4).

trl (s) = trs + dtr (3)
trl (s): start time when the conveyance speed is slow dtr (s): deviation time from the standard start time tfl (s) = tfs + dtf (4)
tfl (s): Stop time when the transport speed is slow dtf (s): Deviation time from the standard stop time FIG. 3 shows a case where the transport speed is fast and slow with respect to the standard start time trs of the mail processing sorter mechanism. It is a figure explaining a relationship.

  When the A transport mechanism and the B transport mechanism are driven by independent motors 8a and 8b, the torque difference between these motors 8a and 8b, the difference in softness and length between the drive belts 6a and 6b or the transport belts 1a and 1b, respectively. Or the load varies depending on the difference in the weight of the paper sheets, etc., the transport speed of each transport path may deviate from the standard transport speed. In particular, when starting and stopping, the acceleration operation or the deceleration operation is performed, so that the deviation becomes large.

  For this reason, a mechanism A such as a mail processing sorting machine is set with an allowable range A for the conveyance deviation of the conveyance speed. For example, an allowable value of ± dtrs with respect to the standard activation time trs is calculated as shown in Equations (5) to (7), and an upper limit value trsh and a lower limit value trsl of the standard activation time trs are set.

trsl = trs−dtrs (5)
trsh = trs + dtrs (6)
A = 2dtrs (7)
trs: standard startup time trsl: lower limit value of standard startup time trsh: upper limit value of standard startup time dtrs: allowable value A: allowable range Therefore, the startup time tr is changed from the lower limit value trsl of the standard startup time to the upper limit value trsh of the standard startup time. The transport speed in this range is the standard transport speed.

  On the other hand, when the activation time tr is equal to or lower than the lower limit value trsl of the standard activation time, the conveyance speed is in a fast range (range H in FIG. 3), and when the activation time tr is equal to or greater than the upper limit value trsh of the standard activation time, the conveyance speed is low. Yes (range L in FIG. 3).

  Next, as described above, a method for reducing the difference in the conveyance speed at the time of activation between the A conveyance mechanism unit and the B conveyance mechanism unit will be described with reference to the flowchart shown in FIG.

  In the following control, the A transport mechanism 20a side is controlled by the control circuit 8a (first control means), and the B transport mechanism 20b side is controlled by the control circuit 8b (second control means). The control circuits 8a and 8b are controlled by the main control circuit (not shown) such as initial setting and emergency stop. Since the A transport mechanism unit 20a and the B transport mechanism unit 20b have the same structure, the operation of the A transport mechanism unit 20a will be mainly described below, and the operation of the B transport mechanism unit 20b can be read in parentheses. it can.

  The control circuit 8a (8b) outputs a start signal to the inverter 3a (3b) (S1). This start signal is made up of a current frequency command or a voltage frequency command set in advance with respect to the reference speed at the start-up for the control circuit 8a (8b).

  The control circuit 8a (8b) sets the frequency for starting the drive motor 4a (4b) in the inverter 3a (3b). (S2 (S7)). This frequency is set continuously until the conveyance speed reaches the standard conveyance speed Vs during the activation time trs shown in FIG. For example, when the standard activation time is 2 seconds (s) and is set once in 100 milliseconds (ms), it is set 20 times in 2 seconds.

  As a result, the drive motor 4a (4b) is driven in accordance with the conveyance speed timing chart shown in FIG. The driving force of the drive motor 4a (4b) drives the transport rollers 2a1 (2b1), 2a2 (2b2) and the transport belt 1a (1b) by the mechanism for transmitting the power source described above. As a result, an encoder pulse is output to the control circuit 8a (8b) from the encoder 7a (7b) disposed on the rotating shaft of the transport path 2a2 (2b2).

  The control circuit 8a (8b) monitors and compares the encoder pulse EPA (EPB) output from the encoder 7a (7b) and the encoder pulse EPB (EPA) output from the encoder 7b (7a). The difference dEP is calculated by the formulas (8) and (9) (S3 (S8)). Formula (9) is calculated by the control circuit 8b of the B transport mechanism.

dEPab = EPA-EPB (8): A transport mechanism section dEPba = EPB-EPA (9): B transport mechanism section EPA: Number of encoder pulses EPB output from the encoder 7a : Encoder pulse number output from encoder 7b dEPab: Difference in encoder pulse number between EPA and EPB dEPba: Difference in encoder pulse number between EPB and EPA Here, the encoder pulse output from encoder 7a (7b) is the encoder 7b ( Whether the determination level K is exceeded by the encoder pulse output from 7a) is obtained by Expressions (10) and (11).

dEPab-K ≧ 0 (10)
dEPba-K ≧ 0 (11)
K: Determination level for determining dEP As a result of the determination, if the transport speed of the A transport mechanism section 20a (B transport mechanism section 20b) is faster than that of the B transport mechanism section 20b (A transport mechanism section 20a) (Yes in S4) (Yes in S9)), a frequency difference to be set in the inverter 3a (3b) in order to lower the transport speed of the A transport mechanism 20a (B transport mechanism 20b) is calculated (S5 (S10)), and the frequency to be reset Is set (S2 (S7)). However, when the transport speed of the A transport mechanism 20a (B transport mechanism 20b) is approximately the same as the transport speed of the B transport mechanism 20b (A transport mechanism 20a) (No in S4 (NO in S9)), transport Since it is not necessary to change the speed, the frequency is not reset (S6 (S11)).

  The above operation will be described with reference to FIG. FIG. 5 is a diagram for explaining the conveyance speed correction. Since the conveyance speed correction is performed in the same manner independently by the control circuit 8a and the control circuit 8b of the A conveyance mechanism unit 20a and the B conveyance mechanism unit 20b as described with reference to FIG. The conveyance speed correction of the unit 20a will be described, and the conveyance speed correction of the B conveyance mechanism unit 20b will be omitted.

  In addition, A conveyance path in a figure is a conveyance path along which a paper sheet is conveyed by A conveyance mechanism part 20a. Similarly, the B conveyance path is a conveyance path through which paper sheets are conveyed by the B conveyance mechanism unit 20b.

  FIG. 5A is a diagram before correction for explaining the correction of the conveyance speed of the A conveyance path. The conveyance speed 30ra when the A conveyance mechanism unit 20a is started, the conveyance speed 30fa when the A conveyance mechanism unit 20 is stopped, and the B conveyance mechanism unit 20b. The figure shows the transport speed 31rb at the time of starting and the transport speed 31fb at the time of stop. This figure shows an example in which the transport speed of the A transport mechanism section 20a is higher than that of the B transport mechanism section 20b both at startup and at stop.

  Here, at any time tn at the time of activation, the difference dEPab in the number of encoder pulses corresponding to the transport speed of the A transport mechanism section 20a corresponds to the transport speed of the B transport mechanism section 20b satisfies Expression (10), and the transport speed correction is necessary. Shows the case. The stop time will be described later.

  FIG. 5B is a post-correction diagram illustrating the correction of the conveyance speed of the A conveyance path. The conveyance speed 30ra when the A conveyance mechanism unit 20a is started, the conveyance speed 30fa when the A conveyance mechanism 20a is stopped, and the B conveyance mechanism unit 20b. The figure shows the transport speed 31rb at the time of starting and the transport speed 31fb at the time of stop. Hereinafter, the startup will be described.

  In this figure, since the transport speed when the A transport mechanism section 20a is started is faster than that of the B transport mechanism section 20b, the transport of the A transport mechanism section 20a is performed at time tn when the value of dEPab exceeds the determination level K for determining dEPab. The speed is reduced to match the speed with the transport speed of the B transport mechanism 20b. This process is similarly performed at an arbitrary time tn + 1. As a result, at the time of startup, the A transport mechanism unit 20a and the B transport mechanism unit 20b are transported at different transport speeds. At the time tn at the time of startup, the transport speed of the A transport mechanism unit 20a is the transport speed of the B transport mechanism unit. Adapted to.

  When the encoder pulse monitoring is performed, for example, every 100 (ms), the frequency is reset according to the monitoring.

  The stop time will be described later.

  As described above, the method of reducing the speed difference between the transport speeds at the time of starting the transport path that is transported by the independent driving force, such as the A transport mechanism section 20a and the B transport mechanism section 20b, is performed by each control circuit. This is performed so that the faster transport speed is matched to the slower transport speed. This is because the transport path with a low transport speed may be subjected to some load and the transport speed is slow, and increasing the transport speed in this state may cause a new failure. This is because it is considered.

  Next, a method for making the transport speed at the stop time constant in the A transport mechanism section 20a and the B transport mechanism section 20b will be described with reference to the flowchart shown in FIG. The method of making the conveyance speed at the time of stop shown in FIG. 6 and the method of making the conveyance speed at the time of activation shown in FIG. 4 constant are the same as the encoder pulse 7a of the A conveyance mechanism unit 20a and the B conveyance mechanism unit 20b. The conveyance speed correction method is different when an encoder pulse difference exceeding a predetermined value is generated between the encoder pulses 7b. Therefore, this part will be described and the description of other parts will be omitted. Since the A transport mechanism unit 20a and the B transport mechanism unit 20b have the same structure, the operation of the A transport mechanism unit 20a will be mainly described below, and the operation of the B transport mechanism unit 20b will be read in parentheses. Will be described.

  The control circuit 8a (8b) monitors and compares the encoder pulse EPA (EPB) output from the encoder 7a (7b) and the encoder pulse EPB (EPA) output from the encoder 7b (7a). The difference dEPab is calculated by the formula (12) by the A transport mechanism unit 20a (S22), and the B transport mechanism unit 20b is calculated by the formula (13) (S27).

dEPab = EPA-EPB (12): A transport mechanism section dEPba = EPB-EPA (13): B transport mechanism section EPA: Number of encoder pulses EPB output from the encoder 7a : Number of encoder pulses output from the encoder 7b dEPab: Difference between EPA and EPB dEPba: Difference between EPB and EPA Here, whether the difference dEPab or dEPba of the encoder pulse is equal to or higher than the determination level K is obtained by Expression (14).

dEPab-K ≧ 0 (14)
dEPba-K ≧ 0 (15)
K: Determination Level for Determining dEPab or dEPba When Formula (14) is satisfied (Yes in S23), since the transport speed A is slower than the transport speed B, the inverter 3a (3b) is used to increase the transport speed A. The frequency difference to be set is calculated (S24 (S29)), and the frequency to be reset is set (S21 (S26)). However, when the transport speed of the A transport mechanism 20a (B transport mechanism 20b) is approximately the same as the transport speed of the B transport mechanism 20b (A transport mechanism 20a) (No in S23 (N0 in S28)), transport Since it is not necessary to change the speed, the frequency is not reset (S25 (S30)).

  When the encoder pulse monitoring is performed, for example, every 100 (ms), the frequency is reset according to the monitoring.

  Next, the conveyance speed correction at the time of stop is demonstrated using FIG. 5 (B). FIG. 5B is a post-correction diagram illustrating the transport speed of the A transport mechanism unit 20a. The transport speed 30ra when the A transport mechanism unit 20a is started, the transport speed 30fa when the A transport mechanism unit 20a is stopped, and the B transport mechanism unit. The conveyance speed 31rb at the time of starting of 20b and the conveyance speed 31fb at the time of a stop are shown in figure. Hereinafter, the stop time will be described.

  In this figure, since the transport speed when the A transport mechanism unit 20a is stopped is slower than that of the B transport mechanism unit 20b, the transport of the B transport mechanism unit 20b is performed at time tm when the value of dEPab exceeds the determination level K for determining dEPab. The speed is accelerated in order to match the transport speed of the A transport mechanism unit 20a with the speed. This process is similarly performed at an arbitrary time tm + 1. As a result, at the time of stop, both the A transport mechanism unit 20a and the B transport mechanism unit 20b are transported at different transport speeds, but at the time tm at the time of stop, the transport speed of the B transport mechanism unit is reached.

  As described above, in order to reduce the difference in transport speed when the transport path transported by independent driving forces, such as the A transport mechanism section 20a and the B transport mechanism section 20b, the transport speed of the slower transport speed is reduced. Is controlled to match the faster conveyance speed. This is because when the conveyance speed is reduced, the conveyance path with a high conveyance speed is less likely to be decelerated because the inertial force due to the load is larger, and the conveyance path with a relatively low conveyance speed is This is because there is a case where the speed is decelerated according to a predetermined value, so that the transport speed of the transport path having the slow transport speed is matched with the transport speed of the transport path having the fast transport path.

  As described above, according to the first embodiment, the transport speed of the transport path transported by independent driving forces, such as the A transport mechanism section and the B transport mechanism section, at the start time and at the stop time, etc. Even when there is a sudden speed change or load fluctuation, the speed difference can be reduced so that the transport speeds of these transport paths are constant for each section. In addition, by reducing the difference in transport speed, it is possible to prevent the occurrence of problems such as paper sheet collision and overlap.

  FIG. 7 is an arrangement diagram when a plurality of conveyance mechanism units according to the second embodiment of the present invention are arranged in the conveyance direction. Paper sheets 11a to 11e exist in the transport paths 1a to 1e at the rear of each transport machine, and are transported in the direction of the arrow X in the drawing.

  Here, paying attention to the conveyance path 1c of the conveyance mechanism unit 20c, an operation in correcting the conveyance speed during the normal operation of the conveyance path 1c will be described. The control circuit 8c (not shown) of the rear part 20c of the transport machine outputs from the encoder pulse EPC of the encoder 7c of the rear part 20c of the transport machine and the encoders 7d and 7eb of the transport mechanism parts 20d and 20e arranged downstream of the transport direction. The difference dEP from the smallest encoder pulse value (slowest conveyance speed) is calculated from the encoder pulses EPD and EPE. Formulas (16) to (19) show examples when EPD is the smallest.

dEPcd = EPC-EPD (16)
dEPcd: difference between encoder pulse EPC and encoder pulse EPD dEPcd−K ≧ 0 (17)
dEPed = EPE-EPD (18)
dEPed: difference between encoder pulse EPE and encoder pulse EPD dEPed−K ≧ 0 (19)
K: Determination level for determining dEP.

  When EPD is the smallest and Formulas (17) and (19) are satisfied, the transport speed of the transport mechanism unit 20c is reduced in accordance with the transport speed of the transport mechanism unit 20d. That is, the transport speed of the transport mechanism section 20c that has been noticed is set to the transport speed that is the slowest transport speed of the transport mechanism section disposed downstream of the transport mechanism section 20c in the transport direction.

  Similarly, paying attention to the transport path 1b of the transport mechanism section 20b, the transport speed during the normal operation of the transport path 1b is the transport speed of the transport path with the slowest transport speed among the transport mechanism sections 20b to 20e. Set to speed. Since the other conveyance paths are the same, description thereof is omitted.

  By doing in this way, when the conveyance paths of the plurality of divided conveyance mechanisms are driven by a plurality of drive motors, the conveyance speed of the plurality of conveyance paths can be controlled to be constant. It is possible to prevent the occurrence of defects such as paper sheet collision and overlap. Therefore, there is no damage of paper sheets.

The block diagram of the mail processing sorter mechanism part by Example 1 of this invention. The timing chart explaining the conveyance speed from starting to a stop of a mail processing sorter mechanism part. The figure explaining the relationship between the case where the conveyance speed with respect to the standard starting time of a mail processing sorter mechanism part is quick, and is slow. The flowchart which makes constant the conveyance speed at the time of starting in A conveyance mechanism part and B conveyance mechanism part of a mail processing sorter mechanism part. The figure explaining the conveyance speed correction | amendment of A conveyance mechanism part and B conveyance mechanism part in a control circuit. The flowchart which makes constant the conveyance speed at the time of a stop in A conveyance mechanism part and B conveyance mechanism part of a mail processing sorter mechanism part. FIG. 9 is a layout diagram when a plurality of transport mechanism units according to the second embodiment of the present invention are disposed in the transport direction.

Explanation of symbols

1a, 1b Conveying belt 2a1, 2a2, 2b1, 2b2 Conveying roller 3a, 3b Inverter 4a, 4b Motor 5a1, 5a2, 5b1, 5b2 Pulley 6a, 6b Drive belt 7a, 7b Encoder 8a, 8b Control circuits 11a, 11b Paper sheets 20a A transport mechanism section 20b B transport mechanism sections 21a, 21b transport sections 22a, 22b transport speed correction section

Claims (5)

A first transport path for transporting paper sheets;
First transport speed measuring means for measuring the transport speed of the first transport path;
A second transport path arranged adjacent to take in the paper sheets transported from the first transport path;
Second transport speed measuring means for measuring the transport speed of the second transport path;
Comparing the measurement results of the first and second transport speed measuring means, the first and second control means for controlling the transport speed of the first transport path and the second transport path, respectively. Paper sheet conveying device characterized by the above. The first or second control means includes
As a result of comparing the measurement result of the first transport speed measuring means with the measurement result of the second transport speed measuring means at the start-up or normal operation, the slower of the first or second transport speed The paper sheet transport apparatus according to claim 1, wherein the transport speed is controlled so as to be equal to the transport speed of the transport path. The first or second control means further includes
At the time of stop, as a result of comparing the measurement result by the first transport speed measuring means and the measurement result by the second transport speed measuring means, the faster transport speed of the first or second transport speed is The paper sheet transport apparatus according to claim 1, wherein the paper sheet transport device is controlled to have a transport speed of the transport path. A plurality of conveyance paths for conveying paper sheets;
A plurality of transport speed measuring means for measuring transport speeds of the plurality of transport paths;
As a result of measurement by the corresponding conveyance speed measuring means of the plurality of conveyance paths arranged downstream in the conveyance direction of the plurality of conveyance paths at the time of start-up or normal operation, conveyance with the slowest conveyance speed The paper sheet conveying apparatus according to claim 1, further comprising: a control unit configured to control the conveying speed so that the conveying speed of the path becomes equal to the conveying speed of the conveying path. The control means further includes
As a result of comparing the measurement results of the conveyance speed measuring means of the plurality of conveyance paths when stopped, the conveyance speed of the conveyance path is set to the highest conveyance speed among the conveyance speeds of the plurality of conveyance paths. The paper sheet transport apparatus according to claim 4, wherein the transport speed of the transport path is controlled.

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